How to adjust the clearance by manipulating the preload of the painful bearing

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How to adjust the clearance by manipulating the preload of the painful bearing

Source: China Bearing Network Time: 2018-07-29
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Bearings in the process of the device to control the preload amount are mainly angular touch ball bearings, painful bearings, tapered roller bearings, tapered double row cylindrical rollers, etc.; in the final period of these types of bearing devices; To adjust the clearance; that is, to control the preload (load); especially for the shaft of the machine, which has strict requirements on the rotation accuracy, noise and temperature rise; not only the pre-tightening amount (load) adjustment clearance in the initial device And also need to adjust in the application. Pre-tightening control methods are more; the following are several ways to control the pre-tightening amount to adjust the clearance.
(1), use the bearing end cover to pad; the end of the bearing will be tightened; the other end of the bearing will not be placed in the gasket; tighten the screw; when the shaft can not be freely changed; clarify that there is no play in the shaft system; Measure the gap between the end cover and the end face of the bearing seat; add the required clearance value to the value of the spacer (2), select the middle distance sleeve; the length of the inner ring spacer can be the length of the outer ring of the bearing and the support scale Calculated; can also be measured to determine the pre-tightening load of the pain bearing is more difficult; a small amount of special instrument detection; most use the dial gauge to measure the axial direction of the shaft; radial displacement or measurement of the starting conflict torque to detect Some foreign bearing companies have always been at the optimum value for preloading load; special instruments and some layouts are used to detect and adjust the preloading load; the preloading load can be controlled.
(3) Measuring the deformation amount of the pre-tightening spring; pre-measuring the relationship between the load and the deformation of the spring; adjusting the load of the constant pressure preload by controlling the deformation amount (4), measuring the starting conflict torque of the pain bearing; Measuring the contact friction torque of the bearing and the axial load; adjusting the pre-tightening amount by manipulating the starting conflict torque; axial preloading of the tapered roller bearing commonly used for paired devices (5), measuring the axial displacement of the bearing Regarding the taper hole bearing, the axial load and the axial displacement of the misaligned bearing are measured in advance; the preload amount is adjusted by the axial displacement amount (6), and the tightening torque of the nut is measured; when the bearing is preloaded with the nut Adjust the preload by tightening the tightening torque of the nut
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